FAQ:Why allow zero stretching at all?
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Analog compatibility mode is only one use for zero stretching. Other possible uses include the following:
- Providing a stretched zero after each packet for the purpose of superimposing locomotive feedback to the command station.
- Allowing generation of the command control signal with a computer using a standard serial port, which may not be possible without slightly stretching some zeros.
- There are probably other uses that will become apparent as time goes on. Note that the above-mentioned uses are still very much in the experimental stages. The point is that preserving the ability to stretch zeros allows for the possibility of some interesting things.